Gas burner



April 19, 1932. WILDHABER 1,854,323

GAS BURNER Filed April 21. 1927 FIG-6 III III INVENTQR EWr WVum PatentedApr. 19, 1932 umrsn STATES ,PAT"ENT' FF1CE ERNEST, WILDHABEB, OFBROOKLYN, NEW YORK ASSIGNOR F ONE-H AL]? T0 G TYR, OF ROCHESTER, NEWYORK.

GAS. BURNER Application filed April 21,

The present invention relates to gas burners, and especially to gasranges, suchas are used in households.

Gasburners, especially gas ranges hitherto constructed contain thedrawback and danger, that a small flame can be easily blown out. Suchan: everydayoccurrence may have sometimes disastrous results, inasmuchas unburnt gas: is; poisonous to the. human organism, as

wellknown.

OneJma-in object of the present invention is to provide increasedprotection of small flames, and to preventthem from being blown out.

Another object is to improve the combus-' tion at low'flame.

My invention isexemplified in the accompanying drawings, in which Fig.land Fig. 2 are a partial-plan view 29 and corresponding frontelevational view, the latter'showrr partlyin section, of a gas burneraccording to the present invention. The shown type of gas-burner may beused for-instance in laboratories.

Fig. 3 and Fig. 4 are a plan view and a corresponding; section alonglines AA of anelnbodiment of the present invention as applied 1301-15116sta-rterfl'ame of a gas range. 1 Fig.v 5 isra section of agas burner,illustrattve ofa modification as compared with Fig. 4."

Fig. 6 is a plan view ofa, gas burner, such as may be: used- .inhousehold gas ranges for produci-lrgthe cookingflame, said gas burnerbeing constructed according to thepresent invention.

Fig; 7 is-asectionalong lines B-B of Fig. 6. V

Fig. Sand. Fig19 are a section and aside viewof a protective member,showing adj-acent parts insecti-on, the protector being illustratixve ofa refinement as com-pared with the protecto-rshown as. part of thegas-burner of Fig;

In the Figures 1 and 2-,. the numeral l1denotes-thebody of gas burnerdiffering from knownpty pesby having ribs 12 provided at the-top, and bycontaining an additional protective memberv 13-. Member 13 contains acentral lpart 14,,which is preventedfromsubstantial loss of heat by theconfiguration of part 15. Member 13' isplacedon the top of 1927.Serial'No. 185,513.

JOSEPH body 11, and rests with part 15 on the ribs 12 v Owing to itsprotection from loss of heat, part 14 adjacent flame 16 stays very hot,even when the flame is at its smallest.

The proportions are preferably so selected, that the temperature ofpart14 exceeds the lowest lighting temperature of gas. A small gas flamewill therefore not be immediately cooled (bycontact with a cool body asat present), but will stay hot inasmuch as it passes the hot member 14.In this manner duration of combustion is not unduly shortened, andperfect combustion is assured.

A'usual gust of wind,1-t 1s evldent, will not be able to cool the'fla'me16 sufficiently toblow it out, on account of the hot member 14. Andif anexceptionally strong and sudden gust of wind should blow it out aninstant, the flame will immediately start burning again, because part 14is preferably .kept hotter than the lighting temperature of. gas, andits mass is made sufficiently large-,that it retainsatem-i perature inexcess of lighting temperature even after being cooled fora momentbywind. Part 14 will then act like a match and start combustion again.

Ribs 12 not onlyhold member 13, but they also add cooling surface to thetop of body 11. It-is important that body 11 remains cool,for itcontains gas and air already mixed, air entering at 18. If its top.should become very hot, combustion might take place in body 11, which isentirely undesirable. This p.ossi-" bility isremoved through theadditional cool-' ing' surface afforded by ribs 12, so-ithat theproximity of the hot part 14 has no harmful influence.

If so desired, member 13 maybe removably placed on body 11', so-that itcan be; taken oflf with one hand. Although member 13' can beeasilyremoved, it is not necessary to do so when a large flameis beingused.

An application ofthe'present invention to starter flames will now bedescribed with reference to the Figures 3 5. a

20- denotes a conduit admitting gas to apermanent starter flame21through'small-holes 22. When the gas is admitted at fullpressure, theflames will shoot out from' the small holes, and "extend throughopenings 23 to theindividual burners of the range. Ordinarily howeverthe starter flame 21 will be very small. It is protected by member 24,made of suitable insulating or semi-insulating mate Member 2 1 isprovided with such a configuration, that the inside points of itpreferably stay hotter than lighting temperature of the gas. The outsidesurface of member 24 however, will usually be much cooler.

Member 2 1 is secured to a substantially cylindrical member 28, which isremovably placed around flame 21, and which somewhat protects space 26from wind.

Air is admitted to the small flame to some extent through holes 23 andespecially through openings 25 (see Fig. 3). V The combustion air leavesat the top of member 24.. It is noted that the points where the airenters and the point where the combustion air leaves space 26 aresomewhat close together. Wind will therefore equally affect thesepoints; when causing a suction at the central hole, it will also cause asuction at the openings 25, so that excessive draft will seldom occur.

Fig. 5 illustrates an embodiment, in which protective member 30 is madeof metal, that is of a good conductor of heat. In order to keep thecentral part 31 at the desired high temperature, means are preferablyprovided for reducing loss of heat, such as a second part 32,surrounding part 31, and holding it along small areas only. Part 32 mayalso be made of metal, as shown. An air space 33 is left between parts31 and 32, except at the points of contact. The points of contact ofpart 31 may be kept cooler than the other part by such means as shown atthe top of part 31. A circular groove is there provided, which hampersconvection of heat to the points of contact with part 32.

Starter flames are usually supplied with pure gas, and do not containadmission of air before the flame, as do the cooking flames. Accordingto the present invention combustion may be made perfect nevertheless, byproviding means for heating the air prior to its admission to the flame.The air is heated by the same members 24 and 31 respectively, whichprotect'the flame from sudden extinction.

An embodiment of the present invention as applied to cooking flames ofgas ranges will now be described, referring to the Figures 6 and 7 Gasmixed in known manner with air is admitted through the arm 35 and passesto arms 36 of a distributor 37. It leaves the distributor through holes38 of the arms 36, and burns up after having left the holes. In a casesuch as the one illustrated I preferably confine protection to one or afew of the individual flames, and dispose the holes in such manner, thata protected flame or the few protected flames can light the other flamesagain after sudden extinction. Extinction should be prevented, when theflame is in actual use, while little attention needs to be given to thecase of an open flame. An open and unused flame is seldom left withoutattention.

In the embodiment shown in Figs. 6 and 7 a central gas hole 40 heats upa protector 4-1 of substantially cylindrical form, resting on a ring 39of suitable insulating material. Protector 41 contains two symmetricallyplaced slots 42, which lead the hot combustion air past the two gasholes 43, 44 respectively. Protector 4:1 and especially its slots 42assume a high temperature, which is preferably kept above the lightingpoint of gas, but, even if kept below, the protector Will have abeneficial influence.

The individual flame at 40 will be prevented from extinction by the hotprotector 41; and its hot combustion air will relight the flames at 13,14. Then the fire will gradually reach the other holes.

The Figures 8 and 9 illustrate a slightly modified embodiment of theprotector of the flame at hole 40. This protector 15 is prevented fromundue loss of heat, by being surrounded by a part 46 which holds it inpoints only, and keeps a separating air space between, except at thepoints of contact. Fig. 9 is a side View showing the slot 12 from thefront. A protector 45 as indicated in the Figures 8 and 9 can be kept ata temperature above the lighting point of gas with less difficulty thanprotector 4:1, and constitutes therefore a refinement in the design of aprotector. Inasmuch as part 46 is not very hot at its lower end, it maybe set directly onto the distributor 37. It is noted that the protectoris placed between the distributor 37 and the heat consumer, such as acooking pan, and out of contact with the heat consumer. While it can bemade in one piece with one of the present known parts, it is preferablyembodied as a separate member, as has been illustrated in the drawings.

It is understood that my invention is capable of further embodimentswithin the scope of the appended claims.

What I claim is:

1. A gas burner containing in combination,

a nozzle facing upwardly for emitting gas, a

3. In a gas burner, a part containing a plurality of nozzles foremitting gas, a protective member disposed on said part, said memberhaving a surface exposed to the gas flame P emitted from a fraction onlyof the whole number of said nozzles, and means for restrictingconvection of heat away from said surface.

4. In a gas burner, a part containing a plum rality of nozzles foremitting gas, a recess provided in the center of said part, a nozzleprovided in said recess, a replaceable protective member disposed insaid recess and having a surface exposed to the gas flame emitted fromthe last named nozzle, means for restricting the conduction of heat fromsaid member to the part containing the gas nozzles, and a groove formedin said member and leading from the last named nozzle towards othernozzles of said part.

5. In a gas burner, a part containing a plurality of nozzles foremitting gas, a replaceable member for protecting said nozzles, saidmember being disposed adjacent a nozzle and having a surface exposed tothe gas flame emitted from the last said nozzle, insulation means forrestricting the conduction of heat from said member to the partcontaining the gas nozzles, and a channel provided in said member andleading from said adjacent nozzle towards other nozzles of said part.

6. In a gas burner, a nozzle for emitting gas, a removable protectivemember disposed adjacent said nozzle, said member containing a channelexposed to the gas flame emitted from said nozzle, and insulation meansfor restricting convection of heat away from said channel, saidinsulation means being disposed in the path of heat flowing from saidchannel 0 to the part containing said nozzle.

ERNEST WILDHABER.

